It doesn't exactly help that the Z10 looks like every other smartphone on the shelf. It's a flat black slab with a touch screen, nearly indistinguishable at 15 feet from the iPhone 5 or a bevy of Android smartphones. The screen measures 4.2 inches diagonally, a bit bigger than the iPhone but smaller than most Android phones. It will go on sale in the US in March, probably for about $200 with a two-year service contract, in line with the iPhone and other rivals.